Carriage fifth-wheel



(No-Model.)

s M. 0001a CARRIAGE FIFTH WHEEL. No. 420,423. Patented Jan. 28, 1890.

MIHEE i To aZZ whom it mag concern.-

UNITED STATES PATENT OFFICE.

STEPHEN M. COOK, OF EAST ATTLEBOROUGH, MASSACHUSETTS.

CARRIAGE FlFTH-WH EEL.

SPECIFICATION forming part of Letters Patent No. 420,423, dated January28, 1890.

Application filed August 14,1889. Serial No. 320,752. (No model.)

Be it known that I, STEPHEN M. 0001;, a citizen of the United States,residing at East Attleborough, in the county of Bristol and State ofMassachusetts, have invented a new and useful Improvement in a Circle orFifth- Wheel for Carriages, of which the following is a specification,reference being had to the accompanying drawings, formingpart thereof.

My invention relates to improvements in circles or fifth-Wheels, inwhich two circles or segmentsof circles (of half-round steel or othermetal) are placed upon each other with their convex parts in contact;and the objects are, first, to prevent sand and dust from lodging uponeither part, and, second, to present as small a part as possible tofriction. I attain these objects by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 shows the frame of awagon-body with axle, circle, or fifth-wheel, bolt, and the cross-bar.Fig. 2 shows a top View of the same parts with the cross-bar directlyover the axle. Fig. 3 shows a top view of the same parts as they appearwhen the axle is turned, as in driving around a circle. Fig. 4 shows avertical section of the upper and lower parts of qhe circle orfifth-wheel.

Similar letters refer to similar parts throughout the several Views.

The lower part of the circle a, is bolted upon the axle, the upper parta to the crossbar. The piece of steel d, (or of other metal,) fashionedso as closely to fit the upper and lower halves of the circle, is alsobolted to the axle for the purpose of holding the parts more securelyand steadily in place at all times. The upper half of the circle a, withthe cross-bar c and bearing upon the lower half 0.,turns upon the boltewhen the wagon is in use.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. The two circles or semicircles a a, placed with their convexsides in contact, substantially as set forth.

2. The two circles or semicircles placed with their convex sides incontact and in combina tion with the piece of steel d, (or other metal,)for the purpose specified.

STEPHEN M. COOK.

Witnesses:

HARMON S. BABoocK, NELSON E. CHURCH.

